• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.613-615
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• 2004

유무선 통신 기술의 발전으로 언제 어디서나 컴퓨터를 이용하는 유비쿼터스 컴퓨팅에 관심이 집중되고 있다. 하지만 기존의 데이터 관리 방법은 유비쿼터스 컴퓨팅 환경에서 파일 서비스를 제공하는 데 어려움이 있다. 유비쿼터스 컴퓨팅 환경의 파일 시스템은 데이터의 유용성, 응용 프로그램에 대한 투명성, 자동데이터 선택 및 저장, 이질적인 장지의 상호 운용을 지원할 수 있어야 한다. 본 논문에서는 이러한 요구사항을 충족시킬 수 있는 유비쿼터스 파일 시스템(UbiFS)를 제안한다. UbiFS는 클라이언트의 현재 상태를 XML을 이용하여 상황 정보(Situation Information)로 구조화하고 SI 메시지를 통해서 서버에게 서비스를 요청하게 된다. 서비스는 클라이언트의 SI 메시지를 관리하는 매니저를 통해서 데이터 동기화와 같은 문제를 해결한다. 그리고 사용자가 직접 데이터를 선택하는 번거로움을 줄이기 위해서 UbiFS는 사용자의 데이터 접근 패턴을 분석하여 시스템 수준에서 데이터를 자동적으로 선택하고 저장할 수 있다.

• KIPS Transactions on Software and Data Engineering
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• v.11 no.10
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• pp.409-418
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• 2022

In this paper, we propose SAAnnot-C3Pap, a semi-automatic annotation method for obtaining ground truth of a player's posture. In order to obtain ground truth about the two-dimensional joint position in the existing music domain, openpose, a two-dimensional posture estimation method, was used or manually labeled. However, automatic annotation methods such as the existing openpose have the disadvantages of showing inaccurate results even though they are fast. Therefore, this paper proposes SAAnnot-C3Pap, a semi-automated annotation method that is a compromise between the two. The proposed approach consists of three main steps: extracting postures using openpose, correcting the parts with errors among the extracted parts using supervisely, and then analyzing the results of openpose and supervisely. Perform the synchronization process. Through the proposed method, it was possible to correct the incorrect 2D joint position detection result that occurred in the openpose, solve the problem of detecting two or more people, and obtain the ground truth in the playing posture. In the experiment, we compare and analyze the results of the semi-automated annotation method openpose and the SAAnnot-C3Pap proposed in this paper. As a result of comparison, the proposed method showed improvement of posture information incorrectly collected through openpose.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1189_1190
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• 2009

최근 철도 차량의 대부분은 인버터 제어에 의한 유도전동기를 채택하여, 많은 사용상의 이점을 내고 있다. 하지만 이 인버터 제어는 장치의 소형 경량화, 저비용화의 관점에서, 1대의 인버터로 복수의 유도 전동기를 구동하는 방식이 주류이다. 최근, 고성능화로 영구자석을 사용한 동기전동기는 산업용, 전기 자동차용과 모든 분야에서 주목을 받아, 소형 경량 고효율"의 특징을 살려서 유도전동기를 대신하여 고성능 모터의 주역이 되고 있다. 본 논문에서는 철도 차량용 주전동기로 이 영구자석 직접구동전동기를 개발하여 기존 유도 전동기와 비교하여 성능을 평가 하였다. 실험을 통해 영구자석 직접구동전동기는 기존 유도 전동기에 비해 고 효율화, 유지보수성 향상 등의 효과가 있음을 알 수 있다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.4
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• pp.509-518
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• 1993

Protocol conversion is to resolve the imcompatibility between networks so that users on different protocols can communicate with each other. This paper designs a formal model, EPN , to increase its modeling power and analyze conversion protocol and proposes a conversion algorithm using it. The conversion algorithm has two capabilities : synchronization and automatic error recovery function. Therefore burden of protocol converter design will be reduced, automatic protocol converter design can be possible and implementation for half-gateway will be easy.

• Journal of KIISE:Computing Practices and Letters
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• v.8 no.1
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• pp.62-70
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• 2002

The purpose of this paper in that users can use mobile device applications more easily and efficiently through MoDAM (Mobile Device Application Management) system. MoDAM automates the process of web retrieval for obtaining mobile device applications and the process of installing or updating it on mobile devices and then supply users with these automated services in a step form by combining two separated processes. We implement a web agent conforming to OSD (Open Software Description) specification for automating software retrieval and downloading and also a mobile device based software management module conforming to SyncML (Synchronization Markup Language) specification for synchronizing common data between server and client. The method of automated software retrieval and management for mobile devices using these standard specifications minimizes users' interrupts and also can be applied to traditional several different mobile devices, operating systems or downloading web sites without platform dependent considerations.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.5
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• pp.1640-1645
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• 2010

There exists an inconvenience that players of each instrument pass musical score in orchestra recital. In this paper, we implement the electronic musical score transmitting system that possible to hand sheet music automatically, using Mini - ITX and LCD Panel. We made them unite with a sheet music pair, and it was made and a message and data transmission were embodied using reliable TCP/IP socket communication. In this paper, the client hands sheet music automatic, and server implemented the manual function to manage each clients individually. Because one band can be managed by one Access file all together, it is easy to manage each band. Along with this, this system selects TCP/IP as the reliable transfer protocol that protect loss and errors.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.314-315
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• 2008

본 논문에서는 임베디드 리눅스와 uCOS-2 간 소스코드 변환에 대한 연구를 위해 API 정변환/역변환기(API 변환기)를 이용하여 두 RTOS 간 소스코드 변환을 실험한다. API 변환기는 임베디드 소프트웨어의 개발을 돕기 위해 개발된 프로그램으로서, 정변환과 역변환 기능을 이용하여 이종 RTOS 간 소스코드를 자동으로 상호 변환한다. 정변환이란 중간형태의 C-코드인 CIC 파일에서 특정 RTOS를 위한 C-코드로 변환하는 것을 의미한다. 반대로 역변환은 특정 RTOS를 위한 C-코드로부터 CIC 파일로 변환하는 것을 가리킨다. 본 논문의 실험에서는 임베디드 리눅스와 uCOS-2의 동기화 소스코드 예제를 API 변환기를 이용하여 상호 변환해본다. 그리고 변환된 소스코드의 정상동작 여부를 확인하기 위해 각각의 타깃보드 위에 소스코드를 포팅한다.

• Journal of the Korea Society of Computer and Information
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• v.12 no.4
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• pp.1-10
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• 2007

This paper describes the development of a network-based passenger information system(PIS) which provides the convenience of the passenger of the train and heightens the effect of the subtitle service, the advertising and the shelter guidance broadcasting against the urgent event. The existing system uses VGA signal distributor in order to broadcast information with image and subtitle and voice guidance. In this paper we improve the existing system by applying the UDP and TCP/IP protocol and use a reference clock to solve a data loss and synchronization problem which occurs in this case. We also developed an XML-based subtitle authoring tool which can edit and play the subtitles with various 3D to improve the automatic guidance broadcasting and advertisement effect according to the operation schedule of the train. The system performance was evaluated through a simulation.

• Journal of Convergence for Information Technology
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• v.9 no.3
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• pp.8-15
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• 2019

Recently, the importance of pre-shipment quality inspection has been emphasized due to the increase of STB supply. In this paper, we propose a method to support automation of quality inspection through simultaneous multi-channel input of STB video signal. The proposed method extracts a fingerprint using the center scan line of the image after stable video shot boundary detection using CeLDP combining color information and LDP code and performs synchronization between input video channels. The proposed method shows stronger shot boundary detection performance than the conventional shot detection method. Through the experiments applied to the real environment, it is possible to secure reliability and real-time quality check for synchronization between multi-channel inputs required for STB quality inspection. Also, based on the proposed method, we intend to study a large-scale quality inspection method in the future and propose a more effective quality inspection system.

• The Journal of Society for e-Business Studies
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• v.8 no.3
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• pp.165-176
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• 2003

Instead of existing cell phones, PDAs are observed as leading wireless Internet devices recently Numerous applications are developed by extended usage of PDAs and it should be installed appropriately according to devices. Furthermore, when battery is discharged, all data stored in RAM(Random Access Memory) becomes obsolete. So it should be recovered or reinstalled from flash memory, backup media or something. In this paper, we present an automatic application installation system(PAIS : PDA Automatic Installation System) to solve problems that users have to install applications by themselves whenever it is necessary. With this system, users feel comfortable by saving time and effort to install each applications and application development companies save cost needed to make materials illustrating installation process. Consequently PAIS may flourish wireless Internet business.